If Opha Superior dies, all summoned by it Guardians Cheru also die, not giving an experience points to player.

During battle with The Sentinel, Guardians Cheru starting spawn from second (fire) phase. There's always two active Guardians Cheru at given moment. In battle with The Empyrean Sentinel their number grows to [?]. They easily can be shot for getting Second Wind, but can bother player with their jump attack, yet still not like Sera Guardians with their rapid-firing.